How many moles are represented by 118 grams of cobalt? cobalt has an atomic mass of 58.93amu

What element has 81 protons in the nuclei of its atoms? A. Platinum B. Uranium C. Lead D. Thallium

Which of these are the correct base pairs of DNA? A. adenine and uracil B. cytosine and guanine C. cytosine adenine D. thymine and guanine

A solution of sucrose in water is 48.5% sucrose by mass and has a density of 1.118 g/ml. what mass of sucrose, in grams, is contained in 3.50 l of solution?

How many moles of aluminum do 3.7 x 1024 aluminum atoms represent?

How many pairs of chromosomes make up a set of homologous chromosomes? A. 1 B. 2 C. 3 D. 4

Audrey is driving 50 miles in 2 hours what is her average speed?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affect the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected?

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

How is an animal cell related to tissue and organs